Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Chemische Physik und Polymerphysik

CPP 11: POSTER Disperse Polymer Systems

CPP 11.8: Poster

Dienstag, 28. März 2006, 17:00–19:00, P3

Aggregation of block copolymers and surfactants studied by fluorescence correlation spectroscopy. — •H. Zettl¹, M. Ruppel², M. Burkhardt², A.H.E. Müller², and G. Krausch¹ — ¹Physikalische Chemie II, Universität Bayreuth, 95440 Bayreuth — ²Makromolekulare Chemie II, Universität Bayreuth, 95440 Bayreuth

In recent years new block copolymers with very low critical aggregation concentrations (cac) have been synthesized. With classical techniques like light scattering and conductivity the exact determination of these cac’s becomes increasingly difficult. Fluorescence correlation spectroscopy (FCS) allows to analyse the diffusion behaviour of single dye molecules to study the aggregation processes of polymers and low molecular weight surfactants. We show aggregation studies starting from well investigated surfactant systems up to complex block copolymers in aqueous solutions and organic solvents.